Genetic Robots + 3D Printing = Robot Apocalypse?

Robots can now be made without a human designer using genetic algorithms that come up with the optimal shape depending on the task terrain. The robot is then printed out with a 3D printer and assembled at ball and joint connections. Such wondrous technology brings to mind a few thoughts:

Will Genetic Robots and 3D printing cause the robot apocalypse? Only if your robot apocalypse requires a specific subset of actions to be initiated.

*and*

Oh how the robot overlords will cry out that their army just lacks someone to assemble them.